无需第三方库，引入echo.js即可..
使用html5的data属性.. 支持IE8+
Example:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>gif</title> <script type="text/javascript" src="echo.js"></script> <script>
//引入后调用该方法 echo.init ({ offset: 100, throttle: 250 }); </script> <style> *{ padding:0px; margin:0px; } .img{ width:448px; height: 448px; overflow: hidden; margin: 0 auto; margin-top: 50px; box-shadow: 0 0 15px #ccc; border-radius: 5px; background: url("./ajax.gif") no-repeat scroll center center #fff; border: 1px solid #aaa; } .img img{ width: auto; height: auto; } </style> </head> <body> <div class="img"> <img data-echo="album-1.jpg" src="blank.gif"> </div> </body> </html>
Echo.js 简单易用的图片延迟加载JavaScript插件
原文：http://www.cnblogs.com/yuerengui/p/3946296.html